package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        //password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {

        System.out.println("Service当前线程的id:"+Thread.currentThread().getId());

        //DTO是前端传给我们的，我们要在service层转化为自己的实体类
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee); //前提：属性名是一样的

        //设置账号状态 默认正常 使用状态常量(DISABLE = 0  ENABLE = 1)
        employee.setStatus(StatusConstant.DISABLE);

        //设置密码,默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes())); //getBytes():存到一个Byte数组
/* ===================由于用了公共字段自动填充功能，所以注释掉====================
        //设置创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());  //LocalDateTime.now():现在时间
        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和修改人id
        // TODO 暂时写死，后期修改
        // TODO 已修改：取出拦截器放入线程存储空间的内容（内容是当前登录的账号id）
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
==========================================================================*/
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize()); //PageHelper插件
        Page<Employee> page =employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //update employee set status = ? where id = ?

        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        /*          等效
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        */
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //前端根据id查询员工信息之后再次传过来的employeeDTO中的id再次查询到数据库，因此获取到!!原始的信息!!
        Employee employee = employeeMapper.getById(employeeDTO.getId());
        //把用户填写的新的信息的对象属性进行拷贝
        BeanUtils.copyProperties(employeeDTO, employee);//新的DTO的属性拷贝到employee
/*===================由于用了公共字段自动填充功能，所以注释掉====================
        //更新时间
        employee.setUpdateTime(LocalDateTime.now());
        //操作的账号 取出拦截器时存入的操作账号id
        employee.setUpdateUser(BaseContext.getCurrentId());
==========================================================================*/
        //调用update方法(原方法是:启用/禁用账号)
        employeeMapper.update(employee);
    }

}
